Iron oxide red dye has the characteristics of strong dyeing power and pure color. As a dye and supplement, used for PVC plastic flooring and PVC color film. Products that do not contain heavy metal photons such as copper and manganese, due to their superior performance, can also prevent rubber aging. So, how is iron oxide red applied in rubber and plastic? Now, let's take a look.
The application of iron oxide red dye on rubber is: after washing and refining the raw rubber, it is processed by machine to obtain the necessary plasticity, and then sulfurizing agents, dyes, zinc oxide, calcium carbonate and other additives are added for operation to obtain rubber blanks. Then polish and shape various rubber products.
The application of iron oxide red dye on plastics: For example, when using products on mineral wool plastic brake pads, taking rosin, mineral wool, and iron oxide dye as examples, adjust the viscosity with flux, knead and dry, and then take the mineral wool plastic and put it into press I for molding. Wood grain packaging paper is dyed with iron oxide red dye for PVC plastic. Firstly, mix the iron oxide dye with plasticizers such as zinc phthalate. Make coarse paddles (dosage divided into 2:1, 1:1, 1:0.5, etc. according to oil absorption), put them into a flat roller machine or a three roller machine for grinding (with transparent and opaque films), and then mix all ingredients and paddles according to the prescription of transparent or opaque films, and evenly distribute them until there are no color lines, spots or bottom particles. Put the dyed PVC paste into the coating machine and evenly apply it onto the glass plate. After settling, drying, and defoaming, place it in a 180 rpm blower oven for plasticization. After 10 minutes, remove and cool to obtain colorless or colored PVC film.
Iron oxide red is a cubic crystal powder ranging from orange red to purple red. The relative density is 5.24. Melting point 1565 ℃ (decomposition). Insoluble in water, soluble in hydrochloric acid and sulfuric acid, slightly soluble in nitric acid and alcohol. When burned, oxygen is released and can be reduced to iron by hydrogen and carbon monoxide. Good dispersibility, strong coloring and covering power. No oil permeability and water permeability. Resistant to temperature, light, acid, and alkali.